<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="./bootstrap/css/bootstrap.css" />
  </head>
  <body>
    <!-- Standard button -->
    <button type="button" class="btn btn-default btn-lg">
      （默认样式）Default
    </button>

    <!-- Provides extra visual weight and identifies the primary action in a set of buttons -->
    <button type="button" class="btn btn-primary" disabled="disabled">
      （首选项）Primary
    </button>

    <!-- Indicates a successful or positive action -->
    <button type="button" class="btn btn-success btn-sm">
      （成功）Success
    </button>

    <!-- Contextual button for informational alert messages -->
    <button type="button" class="btn btn-info btn-xs">（一般信息）Info</button>

    <!-- Indicates caution should be taken with this action -->
    <button type="button" class="btn btn-warning btn-block">
      （警告）Warning
    </button>

    <!-- Indicates a dangerous or potentially negative action -->
    <button type="button" class="btn btn-danger">（危险）Danger</button>

    <!-- Deemphasize a button by making it look like a link while maintaining button behavior -->
    <button type="button" class="btn btn-link">（链接）Link</button>
  </body>
</html>
